Patent AU-2019432070-B2 (AU)
Title: Window shade and spring drive system thereof
Inventor: HUANG CHIEN-FONG
IPC: E06B9/262
Filed: 2019-11-13
Granted: 2021-07-22
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) 
(19) World Intellectual Property 
Organization 111111111DI111ii11011111l11IIIDIID111111111111111 
International Bureau (10) International Publication Number 
(43) International Publication Date W O 2020/236212 A1 
26 November 2020 (26.11.2020) W IP0 PCT 
(51) International Patent Classification: TEHYORCO.,LTD.; I &36,Lane338, SidongRd., San
E06B 9/322 (2006.0 1) sia Dist., New Taipei City, 23743 (TW).  
(21) International Application Number: (72) Inventor; and 
PCT/US2019/061296 (71) Applicant (forAO, B, BJ, B W, C, CG, C1, CM, DJ, DZ, 
EG, GA, GH, GAMGN, GQ, GE kE, KA, LR, LS L, AlA, 
(22)InternationalFilingDate3 November 2019 (13.11.2019) AG, ML, MR MW AZ, NA, NE, NG, R, SC, SD, SL, 
SN, ST SZ, TD, TG, 2N, TZ, UG, ZA ZW only): HUANG, 
(25) Filing Language: English Chien-Fong [US/US]; 770 S. Epperson Drive, City of In
(26) Publication Language: English dustry, CA 91748 (US).  
(72) Inventor: HUANG, Chin-Tien; 1 & 36, Lane 338, Sidong 
(30)PriorityData: 23 May 2019 (23.05.2019) US Rd., Sansia Dist., New Taipei City, 23743 (TW).  
A, (74) Agent: CHEN, Ying; Chen Yoshimura LLP, 750 W 
Hamil
(71) Applicant (for all designated,'tates exceptA, B, R.B ton Ave. Unit C, San Pedro, CA 90731 (US).  
CF, CG, CI, C, DJ, DZ, GA, GH, GLGN, GQ, GTE KV, t 
LR, LS, LY, MA, MGML, AIR,MW MZ, NA, NE, NG, RW, (81) Designated States (unless otherwise indicated, for every 
SC, SD, SLSN, ST, SZ, TD, TG, TN, TZ, UG ZM, Z): kind of national protection available) AE, AG, AL, AM, 
AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, 
CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, 
(54) Title: WINDOW SHADE AND SPRING DRIVE SYSTEM THEREOF 
102 
100 130 
120 
132 
1 , 1128 
112 15616 
112A;124 )116A 
16136 184 
118 106A " -184 1- 150 
118A 166106 116B 
126-- 193 
108 
188 1068 -- 1086 
190 -- 114A19 
18B 6 114B 
122 11 0 168 
128 
19515 
192 154 
162- 13 
- ~ ~ 114 
144 140 
195 164 FIG. 1 
NA (57) Abstract: A spring drive system for a window shade includes a housing, a first and a second gear engaged with each other and 
r respectively assembled about a first and a second pivot axis, two springs respectively assembled at two opposite sides of the second 
gear and respectively connected with two take-up reels provided on the first gear, a first cord drum and a third gear fixedly connected 
with each other and assembled about a third pivot axis, the first and third gears being respectively located at different levels along the 
first and third pivot axes and respectively engaged with a first gear train, a second cord drum and a fourth gear fixedly connected with 
each other and assembled about a fourth pivot axis, the second and fourth gears being respectively located at different levels along the 
second and fourth pivot axes and respectively engaged with a second gear train.
W O 2020/236212 A||||||||||||||||||||||||||||I||||||||||||||||||||||||||||||| 
DZ, EC, EE, EG, ES, F, GB, GD, GE, GH, GM, GT, HN, 
HR, HU, ID, [L, IN, IR, IS, JO, JP,R KE, KG, KH, KN, KRP, 
KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, 
MG, MK, MN, MW, MNX, MY, MZ, NA, NG, NI, NO, NZ, 
OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, 
SC, SD, SE, SG, SK, SL, SM, ST, SV SY, TH, TJ, TM, TN, 
TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.  
(84) Designated States (unless otherwise indicated, for every 
kind of regional protection available): ARIPO (BW, Gi, 
GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, 
UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, 
TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, 
EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, 
MC, MK, MT, NL, NO, PL, PT, RO. RS, SE, SI, SK, SM, 
TR), OAPI (BF, BJ, CF, CG. CI, CM, GA, GN, GQ, GW, 
KM, ML, MR, NE, SN, TD, TG).  
Declarations under Rule 4.17: 
- ofinventorship (Rule 4.17(iv)) 
Published: 
- with international search report (Art. 2](3))